Index Catalog // ScholarsArchive@OSU

Western forests, fire risk, and climate change

Creator:: Rapp, Valerie
Abstract:: Climate warming may first show up in forests as increased growth, which occurs as warmer temperatures, increased carbon dioxide, and more precipitation encourage higher rates of photosynthesis. The second way that climate change may show up in forests is through changes in disturbance regimes—the long-term patterns of fire, drought, insects,...
Resource Type:: Article
Full Text:: United States Department of Agriculture Pacific Northwest Research Station Forest Service http

Composition, volume, and prices for major softwood lumber types in western Oregon and Washington, 1971-2020

Creator:: Weigand, James F.
Abstract:: An analysis of lumber prices provided regressions for price trends during the period 1971-95 for composite lumber grades of major timber species found in the Pacific Northwest west of the crest of the Cascade Range. The analysis included data for coastal Douglas-fir and hem-fir lumber; coastal and inland Pacific Northwest...
Resource Type:: Technical Report

Growth and yield of western larch under controlled levels of stocking in the Blue Mountains of Oregon

Creator:: Cochran, P.H.
Abstract:: Repeated thinning to five growing-stock levels resulted in widely differing tree sizes and volumes per acre after 30 years. Largest trees but the least cubic-volume yield per acre were produced in the heaviest thinning level, whereas highest board-foot yields were found in intermediate thinning levels. partial defoliation by larch casebearer...
Resource Type:: Technical Report

Lodgepole pine development after early spacing in the Blue Mountains of Oregon

Creator:: Cochran, P.H. and Dahms, Walter G.
Abstract:: Seedlings were thinned to spacings of 5, 9, 12, 15, and 18 feet and measured periodically. Twenty-seven years after treatment, quadratic mean diameters increased curvilinearity (p < or = 0.05) as spacing increased, but total height did not differ significantly (p < or = 0.05) with spacing. Corresponding basal areas...
Resource Type:: Technical Report

Reduction in growth of pole-sized Ponderosa pine related to a Pandora moth outbreak in central Oregon

Creator:: Cochran, P. H.
Abstract:: A pandora moth (Coloradia pandora Blake) outbreak began in 1991 in a ponderosa pine (Pinus ponderosa Dougl. ex. Laws) spacing study area that also included scattered sugar pine (P. lambertiana Dougl). The relation of defoliation to five tree spacings (with and without understory vegetation) was examined, and stand growth reduction...
Resource Type:: Technical Report

Pilot experiment of forest fertilization during an outbreak of the western spruce budworm in Northeastern Oregon

Creator:: Mason, Richard R., Wickman, B. E., Paul, H. G., and Torgersen, T. R.
Abstract:: Mixed-conifer stands of grand fir (Abies grandis (Dougl. ex D. Don) Lindl., Douglas-fir (Pseudotsuga menziesii var. glauca (Beissn.) Franco), and ponderosa pine (Pinus ponderosa Dougl. ex Laws.) were fertilized with nitrogen and combination treatments of nitrogen, phosphorus, potassium, and sulfur to test their effects on trees and associated insects during...
Resource Type:: Technical Report

Western forests, fire risk, and climate change

Creator:: Rapp, Valerie
Abstract:: Climate warming may ﬁrst show up in forests as increased growth, which occurs as warmer temperatures, increased carbon dioxide, and more precipitation encourage higher rates of photosynthesis. The second way that climate change may show up in forests is through changes in disturbance regimes—the long-term patterns of ﬁre, drought, insects,...
Resource Type:: Article
Full Text:: United States Department of Agriculture Pacific Northwest Research Station Forest Service http

Stereo photo series for quantifying forest residues in coastal Oregon forests: second-growth Douglas-fir--western hemlock type, western hemlock--Sitka spruce type, and red alder type

Creator:: Ottmar, Roger D. and Hardy, Colin C.
Abstract:: A series of stereo photographs displays a range of residue loadings for cleancut units in three general forest types common to coastal Oregon forest lands: Douglas-fir--western hemlock (second-growth), western hemlock--Sitka spruce, and red alder. Postburn residue levels are also represented for the Douglas-fir--western hemlock, and red alder types. Information with...
Resource Type:: Technical Report

Invertebrates of the H. J. Andrews Experimental Forest, western Cascade Mountains, Oregon. IV, the oribatid mites (Acari: Cryptostigmata)

Creator:: Moldenke, Andrew R., Fichter, Becky L., Pacific Northwest Research Station (Portland, Or.), and H.J. Andrews Experimental Forest (Or.)
Abstract:: A fully illustrated key is presented for identifying genera of oribatid mites known from or suspected of occurring in the Pacific Northwest. The manual includes an introduction detailing sampling methodology; an illustrated glossary of all terminology used; two color plates of all taxa from the H.J. Andrews Experimental Forest; a...
Resource Type:: Technical Report

A pioneer exotic tree search for the douglas fir region

Creator:: Silen, Roy R. and Olson, Donald L.
Abstract:: After three-quarters of a century of introduction of 152 conifer and broadleaf species, no promising candidate exotic was found for the Douglas-fir region. Growth curves spanning 50 years or longer are figured for many species. Firs, pines, larches, spruces, hemlocks, and cedars originating in northwestern North America had superior growth...
Resource Type:: Other
Full Text:: United States Department of Agriculture Forest Service Pacific Northwest Research Station

ScholarsArchive@OSU

Western forests, fire risk, and climate change

Composition, volume, and prices for major softwood lumber types in western Oregon and Washington, 1971-2020

Growth and yield of western larch under controlled levels of stocking in the Blue Mountains of Oregon

Lodgepole pine development after early spacing in the Blue Mountains of Oregon

Reduction in growth of pole-sized Ponderosa pine related to a Pandora moth outbreak in central Oregon

Pilot experiment of forest fertilization during an outbreak of the western spruce budworm in Northeastern Oregon

Western forests, fire risk, and climate change

Stereo photo series for quantifying forest residues in coastal Oregon forests: second-growth Douglas-fir--western hemlock type, western hemlock--Sitka spruce type, and red alder type

Invertebrates of the H. J. Andrews Experimental Forest, western Cascade Mountains, Oregon. IV, the oribatid mites (Acari: Cryptostigmata)

A pioneer exotic tree search for the douglas fir region

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